J/MNRAS/502/L90 Gaia DR2 Galactic bulge new star clusters (Ferreira+, 2021)
New star clusters discovered towards the Galactic bulge direction using
Gaia DR2.
Ferreira F.A., Corradi W.J.B., Maia F.F.S., Angelo M.S., Santos J.F.C. Jr.
<Mon. Not. R. Astron. Soc. 502, L90-L94 (2021)>
=2021MNRAS.502L..90F 2021MNRAS.502L..90F (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Associations, stellar ; Proper motions ;
Parallaxes, trigonometric
Keywords: open clusters and associations: general - Galaxy: stellar content
Abstract:
We report the discovery of 34 new open clusters and candidates as a
result of a systematic search carried out in 200 adjacent fields of
1x1 square degrees area projected towards the Galactic bulge, using
Gaia DR2 data. The objects were identified and characterized by a
joint analysis of their photometric, kinematic and spatial
distribution, which has been consistently used and proved to be
effective in our previous works. The discoveries were validated by
cross-referencing the objects position and astrometric parameters with
the available literature. Besides their coordinates and astrometric
parameters, we also provide sizes, ages, distances and reddening for
the discovered objects. In particular, 32 clusters are closer than
2kpc from the Sun, which represents an increment of nearly 39% of
objects with astrophysical parameters determined in the nearby inner
disk. Although these objects fill an important gap in the open
clusters distribution along the Sagittarius arm, this arm, traced by
known clusters, appears to be interrupted, which may be an artifact
due to the incompleteness of the cluster census.
Description:
Newly discovered UFMG clusters parameters and memberlists.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
param.dat 294 34 Open clusters parameters
members.dat 190 1736 Open clusters members
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Byte-by-byte Description of file: param.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Cluster [4/44] Internal id to relate the memberlist
to the clusters
4- 9 A6 --- Name UFMG name (UFMGNN)
11- 17 F7.3 deg RAdeg Cluster right ascension (J2000)
19- 26 F8.4 deg DEdeg Cluster declination (J2000)
28- 31 F4.2 mag E(B-V) Colour excess
33- 36 F4.2 mag e_E(B-V) Colour excess uncertainty
38- 42 F5.2 mag Dmod Distance modulus
44- 61 F18.13 pc Dist Distance in pc
63- 66 F4.2 mag e_Dmod Distance modulus uncertainty
68- 71 F4.2 [yr] logt Age
73- 76 F4.2 [yr] e_logt Age uncertainty
78- 89 F12.9 mas/yr pmRA Mean proper motion along RA of members,
pmRA*cosDE
91-101 F11.9 mas/yr s_pmRA Standard deviation of pmRA of members
103-115 F13.10 mas/yr pmDE Mean proper motion along DE of members
117-127 F11.9 mas/yr s_pmDE Standard deviation of pmDE of members
129-138 F10.8 mas plx Mean parallax of members
140-150 F11.9 mas s_plx Standard deviation of plx of members
152-172 F21.17 deg GLON Cluster galactic longitude
174-193 F20.17 deg GLAT Cluster galactic latitude
195-212 F18.13 kpc X Position X in Galactic cartesian coordinates
214-233 F20.15 kpc y Position Y in Galactic cartesian coordinates
235-254 F20.15 kpc z Position Z in Galactic cartesian coordinates
256-273 F18.13 kpc RGC Distance from Galactic centre assuming the
Sun is at 8340pc
275-284 F10.5 arcsec rlim Limiting radius, defined as the radius where
the stellar density reaches the sky level
286-294 F9.6 arcsec e_rlim Limiting radius uncertainty
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Byte-by-byte Description of file: members.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Cluster [4/44] Internal id to relate the memberlist
to the clusters
4- 22 I19 --- GaiaDR2 Gaia DR2 star ID
24- 34 F11.7 deg RAdeg Right ascension (ICRS) at Ep=2015.5
36- 46 F11.7 deg DEdeg Declination (ICRS) at Ep=2015.5
48- 53 F6.4 mas plx Absolute stellar parallax
55- 60 F6.4 mas e_plx Standard error of parallax
62- 67 F6.3 mas/yr pmRA Proper motion in right ascension direction,
pmRA*cosDE
69- 73 F5.3 mas/yr e_pmRA Standard error of proper motion in
right ascension
75- 80 F6.3 mas/yr pmDE Proper motion in declination direction
82- 86 F5.3 mas/yr e_pmDE Standard error of proper motion in
declination
88- 94 F7.4 mag Gmag G-band mean magnitude
96-101 E6.4 mag e_Gmag Standard error of G-band mean magnitude
103-109 F7.4 mag BPmag Integrated BP mean magnitude (Vega)
111-116 E6.4 mag e_BPmag Standard error of BP mean magnitude (Vega)
118-124 F7.4 mag RPmag Integrated RP mean magnitude (Vega)
126-131 E6.4 mag e_RPmag Standard error of RP mean magnitude (Vega)
133-139 F7.2 --- chi2 chi2 value
141-145 F5.1 --- NgAL Number of good observations AL
147-151 F5.3 mag E(BP/RP) BP/RP excess factor
153-156 F4.1 --- Nper Number of visibility periods used in
Astrometric solution
158-164 E7.4 --- pmRApmDEcor Correlation between proper motion in right
ascension and proper motion in declination
166-172 E7.4 --- plxpmRAcor Correlation between parallax and proper
motion in right ascension
174-180 E7.4 --- plxpmDECcor Correlation between parallax and proper
motion in declination
182-188 F7.5 --- Pmemb Membership probability
190 I1 --- Fmemb [1] Flag membership
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Acknowledgements:
Filipe A. Ferreira, filipeandradeferreira(at)hotmail.com
(End) Patricia Vannier [CDS] 02-Feb-2021